Improvement



WILLIAM HE'CKERT improvement in Deviees for Changing Speed and Reversing Motion ofPlaning and other Analogous Machines.

No. 125,676, Patented Aprii16,\872-.

I AM. PHOTIF'UTIIOGHAPHIE' CA7. Y/DSEURNEVY FHBCEJ'I. I

Unrrnn 'S'rn'rns ATENT OFFICE.

WILLIAM HECKEBT, OF NEWCASTLE, PENNSYLVANIA.

IMPROVEMENT IN DEVICES FOR CHANGING SPEED AND REVERSING MOTION 0F PLANING AND OTHER ANALOGOUS MACHINES.

Specification forming part of Letters Patent No. 125,676, dated April 16, 1872.

. To all whom it may concern:

Be it known that I, WILLIAM HECKERT, of Newcastle, in the county of Lawrence and State of Pennsylvania, have invented a new and Improved Automatic Device for Changing Speed and Reversing Motion 5 and I do hereby declare that the following is a full, clear, and exact description thereof, reference being bad to the accompanying drawing making part of this specification, in which Figure l is an elevation of the improved device applied to the frame'of a planer. Fig. 2 is a section taken vertically and transversely through Fig. 1. Fig. 3 shows an inside view of the reversing-wheels applied to the friction or belt wheel.

Similar letters of reference indicate corre-' sponding parts in the several figures.

This invention relates to a. novel device which is applicable to planers, shapers, screwcutters, lathes, and other machinery, andwhich is designed for reversing the movements of parts as well as changing the speed thereof.

The following description of my invention will enable others skilled in the art to understand it.

In the accompanying drawing I have represented my invention applied to the frame A G of a machine for planing metal, wherein B represents the rectilinear reciprocating bed on which the metal to be planed is confined, and a-arepresent knockers, of the usual well-known kind, which alternately act against a crankarm, h, at the terminal strokes of said bed, and cause a reversal of the movements of the latter automatically, as will be hereinafter ex-.

plained. D D represent two horizontal trans verse shafts, one of which carries a large spurwheel, not shown, which engages directly with the teeth of a rack on the bottom of the bed B, while the other shaft, 1), carries a pinion spur-wheel, d, which engages with the teeth of said large spur-wheel. The shafts D D are in the same horizontal plane, and carry on their outer ends, outsideyof the frame A, fric-. tion-wheels b b. The largest friction-wheel,

b, is on the shaft D, and the smallest one is .on shaft D, and both wheels have their peripheries beveled in order to increase their friction-surfaces, as shown in Fig. 2. E is an inside friction-wheel, of such diameter as will receive loosely within its double beveled friction-surface i the two wheels I) 1), shown in Fig. 3, and allow this wheel E to be moved late-rally, so as to engage either one of the wheels 11 b with it, or, when desired, to disengage both of these wheels from it. In the drawing, Figs. 1 and 3, the large friction-wheel I) is represented as engaged with the frictionwheel E, which gives the fastest speed to the bed B. The journal 6 of the friction-wheel E has its bearing in the lower end of a swinging bracket, F, which is pivoted at f to the frame 0, so that it is capable of vibration in the di rection of the length of the machine. Below the pivot f a cam, 0, passes through one upright of frame 0, and has applied fast on its outer end a tripping-plate, G, at each upper angle of which is a stud, g. Through the cam c passes'loosely the cranked portion of a vibratin g arm, h, which carries an adjustable weight, w, as shown in Figs. 1 and 2. The weight w, acting through the medium of the cam c and bracket F, presses the surfaces 23 of the wheel E against the periphery of one or the other of the friction-wheels with a force suficient to give all the frictional contact desired; and this pressure can be increased or diminished by adjusting the weight; on the arm h. i

It will be seen from the above description that when the traveliu g bed B reaches the terminus of a stroke one of the knockers a on this bed will strike the crank-arm h of the loaded arm h and move the latter past a vertical plane, when it will fall, and, striking one of the studs 9, will trip the plate G and cause cam c to shift the wheel E. This will reverse the motion of the bed B; and if this bed is to make a backward stroke, the wheels E b will be brought in contact if, however, the stroke be a forward one, the wheel E will be brought in contact with the wheel b, and a slow movement of the bed will result. If the loaded arm h be held in a vertical position, both wheels will be out of contact with the wheel E.

It is obvious that the wheel E may be the belt-wheel; or the belt-wheel may be applied on the shaft 6 of this Wheel E. It is also obhearing, I, in combination with the frictionvious that the Wheels b b may be arranged so wheels b b, substantially as described.

as to act again st the surface of a groove formed 2. The loaded crank-arms h h, tripping-plate into the periphery of the wheel E, instead of G, cam c, and knockers a a, in combination against the inside surface 45, as shown. I prewith the bracket F and friction-wheels b b E, fer the arrangement which I have represented, substantially as described.

as it is compact, and for other reasons more WM. HEGKERT. desirable.

- Having described my invention, I claim as Witnesses:

new- JAMES N. CAMPBELL,

1. The friction-wheel E, having a movable JAMES R. MARTIN, Jr. 

